Pour olive oil into a large skillet, preferably cast iron, set over medium heat. Add Ro-tel tomatoes, crab boil, garlic, and water. Bring to a boil, reduce
heat to low, and simmer to marry flavors, about 20 minutes.

Submerge the fish fillets in the sauce. Cover and lower the heat to medium-low. Simmer for 10 to 15 minutes or until the fish is cooked through. Break fish up into large flakes and serve with rice or hot french bread.